Trenton vs capital of New Jersey

Trenton and capital of New Jersey both are nouns.

Word	Noun	Adjective	Verb	Adverb
Trenton	Yes	No	No	No
capital of New Jersey	Yes	No	No	No

As nouns, Trenton and capital of New Jersey are synonyms defined as:

Trenton and capital of New Jersey: capital of the state of New Jersey; located in western New Jersey on the Delaware river

Trenton (noun)	capital of New Jersey (noun)
capital of the state of New Jersey; located in western New Jersey on the Delaware river	capital of the state of New Jersey; located in western New Jersey on the Delaware river